1. is studying

2. isn't playing

3. are making

4. is having

5. is eating

6. isn't flying

7. am working

8. aren't cooking

9. Is Tom driving

10. aren't preparing

11. are you having

12. Are they giving

13. is making

14. are you doing

15. are you staying

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Cấu trúc thì Hiện tại tiếp diễn: 

(+) S + am/ is/ are + V-ing 

($-$) S + am not/ is not (isn't)/ are not (aren't) + V-ing

(?) Am/ is/ are + S + V-ing

is studying              aren't preparing

will not play            will you have  

are making             will you have 

have had                 Have they give

is eating                  is making

will not fly               do you do

am working             are they stay

don't cook

Is Tom drivng